منابع مشابه
The hardest logic puzzle ever becomes even tougher
" The hardest logic puzzle ever " presented by George Boolos became a target for philosophers and logicians who tried to modify it and make it even tougher. I propose further modification of the original puzzle where part of the available information is eliminated but the solution is still possible. The solution also gives interesting ideas on logic behind discovery of unknown language.
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This article reflects our experience with the preservation of computer programs that once served a scientific purpose, but were not maintained since then. After producing results, published in scientific journals in the 70’s, 80’s and begin 90’s, they were stored provisionally on some kind of persistent medium and are at present restored to current state of the art hardware. We constructed an a...
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Language users never choose words randomly, and language is essentially non-random. Statistical hypothesis testing uses a null hypothesis, which posits randomness. Hence, when we look at linguistic phenomena in corpora, the null hypothesis will never be true. Moreover, where there is enough data, we shall (almost) always be able to establish that it is not true. In corpus studies, we frequently...
متن کاملFinite groups have even more centralizers
For a finite group $G$, let $Cent(G)$ denote the set of centralizers of single elements of $G$. In this note we prove that if $|G|leq frac{3}{2}|Cent(G)|$ and $G$ is 2-nilpotent, then $Gcong S_3, D_{10}$ or $S_3times S_3$. This result gives a partial and positive answer to a conjecture raised by A. R. Ashrafi [On finite groups with a given number of centralizers, Algebra Collo...
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ژورنال
عنوان ژورنال: Journal of the Textile Machinary Society
سال: 1958
ISSN: 1883-8715
DOI: 10.4188/transjtmsj1948.11.793